Celestion Ditton551
Price unknown (1 unit, around 1979?)
Commentary
The first bass reflex type speaker system in Celestion.
A 29 cm cone woofer is installed in the low range.
In addition, it is equipped with a 4.6 cm dome scoker for the middle band and a 1.9 cm dome tweeter for the high band.
Level control is provided for the middle and high frequencies.
The + / - 0 level control provides a balance for classical music, and can be adjusted as necessary to obtain sound quality suitable for pop music.
Model Rating
| Method | 3-Way, 3-Speaker, Bass reflex system, Bookshelf Type |
| Units Used | For low band : 29 cm cone type For Middle Area : 4.6 cm Dome Type For high-pass : 1.9 cm dome type |
| Frequency characteristic | 38 Hz to 20 kHz ± 3 dB |
| Impedance | 8 Ω |
| Maximum allowable input | 140W |
| Compatible amplifier | Output 20W ~ 140W |
| Output sound pressure level | 90 dB SPL/1m (at 3.25W pink noise) |
| Crossover frequency | 600 Hz, 4.5 kHz |
| Level control | For High Range : + 2 dB ~ 0 ~ -6dB For Middle Range : + 2 dB ~ 0 ~ -6dB |
| Internal volume | 65 liters |
| External dimensions | Width 395x Height 720x Depth 328 mm |
| Weight | 25kg |
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